4-2=

In the following list of numerals, how many 2's are followed by 1's but not preceded by 4 ? 4 2 1 2 1 4 2 1 1 2 4 4 4 1 2 2 1 2 1 2 1 4 4 2 1 4 2 1 2 1 2 4 1 4 2 1 2 4 1 4 6 1) 2 2) 3 3) 4 4) 5 5) None of these

(2^3)^4 = (a) 2^4*3 (b) 2^3*4 (c) (2^4)^3 (d) none of these

Factorize: a^2+4b^2-4a b-4c^2

factorize : 4a^2-4b^2+4a+1

(cos ^ (2) ((pi) / (4) -A) -sin ^ (2) ((pi) / (4) -A)) / (cos ^ (2) ((pi) / (4) + A) + sin ^ (2) ((pi) / (4) + A) =)

In the following number series how many 4's are there which are immediately preceded by a pair of numbers whose product is more than the product of the pair of numbers immediately following 4 ? 7 3 4 2 3 4 3 2 2 4 4 6 8 9 4 7 3 4 2 4 6 4 5 4 3 2 4 4 5 2 1) 4 2) 5 3) 6 4) 2 5) None of these

Factorise : 4a^(2) - (4b^(2) + 4bc + c^(2))

Factorise : 4a^(2) - 4ab+ b^(2) - 4x^(2)

Factorize: a^(2)+4b^(2)-4ab-4c^(2)